Features 1、Widely used in construction industry aluminum frame structure, 3D printer, CNC router, CNC laser cutting machine, robot project 2、5-hole placement is designed for vertical joints, very practical 3、Infinite positioning possibilities to achieve maximum flexibility in your own design 4、The main parts are made of aluminum alloy, strong and durable 5、Using advanced technology with excellent craftsmanship to bring smooth surface, which will not hurt your hands in work Specification Item Type: Joining Plate Material: Aluminum alloy Number of Holes: 5 Color: Silver Model Thickness(approx.) Hole diameter(approx.) Hole distance(approx.) Length(approx.) 2020L Shape 4mm / 0.2in 5mm / 0.2in 20mm / 0.8in 60mm / 2.4in 3030L Shape 4mm / 0.2in 6.5mm / 0.3in 30mm / 1.2in 90mm / 3.5in 4040L Shape 6mm / 0.2in 8.5mm / 0.3in 40mm / 1.6in 120mm / 4.7in Package List 4 x Joining Plate